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EP2372187B1 - Reduction gearing and electric actuator with such a reduction gearing - Google Patents

Reduction gearing and electric actuator with such a reduction gearing Download PDF

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Publication number
EP2372187B1
EP2372187B1 EP11158393A EP11158393A EP2372187B1 EP 2372187 B1 EP2372187 B1 EP 2372187B1 EP 11158393 A EP11158393 A EP 11158393A EP 11158393 A EP11158393 A EP 11158393A EP 2372187 B1 EP2372187 B1 EP 2372187B1
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EP
European Patent Office
Prior art keywords
barrel
drum
rotation
guide means
reduction gear
Prior art date
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Application number
EP11158393A
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German (de)
French (fr)
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EP2372187A1 (en
Inventor
Jérôme Pezet
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Somfy SA
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Somfy SA
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H1/00—Toothed gearings for conveying rotary motion
    • F16H1/28—Toothed gearings for conveying rotary motion with gears having orbital motion
    • F16H1/2863—Arrangements for adjusting or for taking-up backlash
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
    • E06B9/56—Operating, guiding or securing devices or arrangements for roll-type closures; Spring drums; Tape drums; Counterweighting arrangements therefor
    • E06B9/68—Operating devices or mechanisms, e.g. with electric drive
    • E06B9/72—Operating devices or mechanisms, e.g. with electric drive comprising an electric motor positioned inside the roller
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H1/00—Toothed gearings for conveying rotary motion
    • F16H1/28—Toothed gearings for conveying rotary motion with gears having orbital motion
    • F16H2001/2881—Toothed gearings for conveying rotary motion with gears having orbital motion comprising two axially spaced central gears, i.e. ring or sun gear, engaged by at least one common orbital gear wherein one of the central gears is forming the output

Definitions

  • the invention relates to a reducer of an electric actuator for the operation of a home automation screen.
  • the invention also relates to an electric tubular actuator for operating a home-automation screen, which comprises such a gearbox.
  • Home automation screens are generally operated by electric tubular actuators. These include an electric motor mounted inside a tube. This electric motor rotates a motor shaft at a relatively high speed, of the order of 2800 revolutions / min (in Europe). Also, to obtain a rotational speed and a torque that can be used at the actuator output, a gearbox is added to the motor. This reducer often includes three stages of reduction.
  • the first stage of the gearbox is composed of a solar, coupled to the output shaft of the electric motor, meshing with three satellites housed in a cylinder and located at the same axial and radial level.
  • the satellites each turn around a tree attached to the barrel.
  • Each satellite is arranged at 120 ° from the other two.
  • Each satellite meshes with the same fixed ring, so as to cause the rotation of the barrel around its axis of revolution.
  • the barrel includes an exit interface of the floor. This interface can be the solar of the next stage.
  • a source of noise comes from moving elements. Accordingly, it is advantageous, from a sound point of view, to improve the positioning of the movable elements relative to each other and more particularly, the parts of the first floor, since they turn the fastest.
  • the patent EP-A-0 863 331 illustrates a design where the motor shaft is guided by a pad inserted in the center of a housing. The end of the motor shaft is connected to the solar of the first reduction stage by a coupling.
  • the housing has a bore for centering the barrel.
  • the solar is centered by a nipple, extending the solar, housed in a patch on the barrel.
  • the meshing game must be reduced, which implies a good positioning between the solar and the satellites. Since the satellites are directly positioned with respect to the barrel, it is important that the solar is equally well positioned relative to the barrel.
  • the solar is well centered at a first end, thanks to the pin at the end of the pinion.
  • the centering of the second end of the solar with respect to the barrel is less direct.
  • the solar is connected to the coupling part which cooperates with the motor shaft, the latter being guided by the bearing fixed to the housing which, finally, centers the barrel.
  • the travel of the second end can be large enough to disrupt the meshing and generate noise.
  • the invention proposes a gearbox for an electromechanical actuator comprising a reduction stage comprising a sun meshing with at least one satellite housed in a barrel.
  • This satellite revolves around a shaft integral with the barrel and meshes with a fixed ring gear to rotate the barrel about an axis of rotation.
  • the solar and the barrel are guided in rotation, around the axis of rotation, by the same guide means.
  • the positioning of the solar with respect to the barrel is direct because the solar is guided in rotation by two guide means in contact with the barrel.
  • the shaft supporting the satellite is fixed on the barrel at each end which ensures a stable position of the shaft in the barrel. The game of meshing is thus mastered.
  • the guide means may be integral with the barrel. It is then in contact with the sun but is also housed, in part, in a location of a fixed housing.
  • the solar is movable relative to the guide means and the subassembly formed of the barrel and the guide means is movable relative to the fixed casing.
  • the guiding means thus ensures the rotational guiding function of the solar and the barrel around their axis of revolution.
  • the guide means may be integral with a fixed housing. It is then in contact with the solar and the barrel to guide the rotating parts. In this case, the solar and the barrel are movable relative to the guiding means.
  • This subset may include the barrel equipped with its satellites, the solar inserted inside, the guide means, a coupling part to a motor shaft and, according to the embodiment, a housing.
  • This invention is particularly suitable for a simple planetary gear type II.
  • the invention also relates to an electric tubular actuator for operating a home automation screen, this actuator incorporating a gear as mentioned above.
  • the figure 1 schematically represents a tubular actuator 1 composed of a tube 2 inside which is housed an electric motor 3.
  • This actuator is intended for the operation of a home automation screen, such as a blind (outside or inside), a shutter wheel, a video projection screen or a closing grid.
  • the electric motor 3 is coupled to a gearbox 4, so that the output shaft 5 of the gearbox rotates at a desired speed.
  • the gearbox 4 comprises a simple planetary gear type II.
  • the tree output 5 of the gearbox corresponds to the output shaft of the actuator. It drives a wheel integral with a winding tube in which is inserted the actuator and around which winds the motorized screen, these elements not being represented.
  • the motor 3 is also powered by an electric cable 6 connected to a control module 7.
  • control module 7 can cut off the motor power when the screen reaches a particular position and / or receives an order from a control point.
  • the control module 7 comprises an interface 71 intended to allow the attachment of the actuator 1 on a support fixed on a frame.
  • the control module is powered by a mains cable 8.
  • the Figures 2 to 4 represent the first stage of the gearbox 4 of the tubular actuator 1.
  • the motor 3, inserted inside the tube 2, comprises a wound stator 31 whose winding bun 31 b is housed inside an O-ring. 32.
  • This O-ring 32 fits into a bowl 33 incorporating a self-lubricating bearing 34 rotating the motor shaft 35.
  • the motor shaft 35 is integral with the motor rotor. It is rotated by the wound stator 31.
  • a first interface piece 36 is fixed to one end of the drive shaft 35. It cooperates with a second interface piece 41, fixed on the solar 42 of the first stage of the gearbox 4. These two interface pieces 36 and 41 form a coupling between the motor 3 and the gearbox 4.
  • the second interface piece 41 is bi-material.
  • a first part 411 is of damping material, for example elastomer. This part cooperates with the first interface piece and reduces the noise.
  • the second part 412 is made of a more rigid material than the first part, for example of metal. This part cooperates with the solar 42 and makes it possible to transmit the torque to the gearbox.
  • the solar 42 comprises a shaft 421 and a pinion 422 mounted tightly on the shaft 421.
  • the pinion 422 comprises two helical gears 422a, 422b.
  • the solar 42 is rotated by the second interface piece 41 mounted clamping on a first end of the shaft 421. It is guided in rotation by two self-lubricating bearings 43, 44. These pads are mounted clamping on a cylinder 45, respectively in bores 453 and 454 whose diameters are D 453 and D 454 .
  • the first bearing 43 guards the shaft 421 with respect to the barrel 45 and is positioned between the interface piece 41 and the pinion 422.
  • the first bearing 43 is integral with the barrel 45.
  • the second bearing 44 also guides the barrel 45. the second end of the shaft 421 with respect to the barrel 45.
  • the first pad 43 comprises an inner radial portion 431 which directly surrounds the shaft 421 and which is situated radially in the barrel 45 and, along the axis X 4 , at the level of this barrel.
  • the shaft 421, whose external diameter D 421 is noted, is rotatably mounted in a bore of the portion 431 of the first bearing 43, whose diameter is D 431 .
  • the portion 431 axially overlaps the barrel 45.
  • the bearing 43 also comprises an outer radial portion 432 which protrudes axially from the barrel 45 towards the motor 3, which allows it to cooperate with the bore 491.
  • Solar 42 meshes with three satellites 46, 46 'and 46 "Each satellite is arranged at 120 ° relative to the other two Each satellite revolves around a shaft 47, 47' and 47" whose ends are mounted on the barrel 45.
  • Each satellite comprises three teeth 46a, 46b and 46c.
  • the first two teeth 46a and 46b are helical and mesh with the helical gears 422a, 422b of the solar.
  • the third toothing 46c is straight and meshes with an internal toothing 48c of a ring 48 fixed in a housing 49. In this way, the rotation of the solar 422 causes the rotation of the barrel 45 about a common axis X 4 .
  • the barrel is guided in rotation, on one side, with respect to the fixed ring gear 48, by a flange 451 housed in a bore of the fixed ring 48 whose diameter is D 48 and, on the other side, against the casing 49, by the outer radial portion 432 of the first bearing 43 which cooperates with a bore 491 of the casing 49.
  • D denotes D 432 the outer diameter of the portion 432 and D 491 the internal diameter of the bore 491 of the casing 49, these diameters being substantially equal.
  • the maximum outside diameter of the bearing 43 is the diameter D 432 of the portion 432. It is smaller than the maximum outside diameter D 45 of the barrel 45.
  • the barrel 45 further comprises an interface housing 452 intended to accommodate a complementary shape of a part 50 of a brake, or the sun of a subsequent reduction stage.
  • the assembly of the actuator can be simplified because a compact subset can be prepared beforehand.
  • the compact subassembly includes the barrel, equipped with satellites and two pads, the solar, housed inside the barrel and centered relative to it thanks to the two pads, and the second piece mounted interface clamping on the end solar. This compact and solid subassembly is easy to handle.
  • the advantage of this solution is a good guidance of the solar compared to the cylinder which induces a good positioning of the solar compared to the satellites.
  • the meshing between the gears is regular, the meshing clearance can be reduced, as can the sound level of the actuator.
  • the first pad 43 has a dual function: It serves both to center the sun 42 in the cylinder 45 and to center the cylinder 45 in the housing 49. It is independent of the housing 49, which allows to design it with small dimensions and thus consider making it in a material promoting rotational guidance, such as self-lubricating bronze.
  • the invention also applies to barrels constituting other types of reduction stages.
  • the barrel is not limited to the use of three satellites. He can bear more or less.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Retarders (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Description

Domaine technique :Technical area :

L'invention concerne un réducteur d'un actionneur électrique pour la manoeuvre d'un écran domotique. L'invention concerne également un actionneur tubulaire électrique de manoeuvre d'un écran domotique, qui comprend un tel réducteur.The invention relates to a reducer of an electric actuator for the operation of a home automation screen. The invention also relates to an electric tubular actuator for operating a home-automation screen, which comprises such a gearbox.

Etat de la technique :State of the art:

Les écrans domotiques sont généralement manoeuvrés par des actionneurs tubulaires électriques. Ceux-ci comprennent un moteur électrique monté à l'intérieur d'un tube. Ce moteur électrique entraîne en rotation un arbre moteur à une vitesse relativement élevée, de l'ordre de 2 800 tours/min (en Europe). Aussi, pour obtenir une vitesse de rotation et un couple exploitable en sortie d'actionneur, on adjoint un réducteur au moteur. Ce réducteur comprend souvent trois étages de réduction.Home automation screens are generally operated by electric tubular actuators. These include an electric motor mounted inside a tube. This electric motor rotates a motor shaft at a relatively high speed, of the order of 2800 revolutions / min (in Europe). Also, to obtain a rotational speed and a torque that can be used at the actuator output, a gearbox is added to the motor. This reducer often includes three stages of reduction.

Selon une conception courante, le premier étage du réducteur est composé d'un solaire, couplé à l'arbre de sortie du moteur électrique, engrenant avec trois satellites logés dans un barillet et situés au même niveau axial et radial. Les satellites tournent chacun autour d'un arbre solidaire du barillet. Chaque satellite est disposé à 120° des deux autres. Chaque satellite engrène avec une même couronne fixe, de sorte à provoquer la rotation du barillet autour de son axe de révolution. Le barillet comprend une interface de sortie de l'étage. Cette interface peut être le solaire de l'étage suivant.According to a common design, the first stage of the gearbox is composed of a solar, coupled to the output shaft of the electric motor, meshing with three satellites housed in a cylinder and located at the same axial and radial level. The satellites each turn around a tree attached to the barrel. Each satellite is arranged at 120 ° from the other two. Each satellite meshes with the same fixed ring, so as to cause the rotation of the barrel around its axis of revolution. The barrel includes an exit interface of the floor. This interface can be the solar of the next stage.

La majorité des fabricants d'actionneur cherche à réduire le bruit généré par ce sous-ensemble. Une source de bruit provient des éléments en mouvement. En conséquence, il s'avère avantageux, d'un point de vue sonore, d'améliorer le positionnement des éléments mobiles les uns par rapport aux autres et plus particulièrement, les pièces du premier étage, puisqu'elles tournent le plus vite.The majority of actuator manufacturers seek to reduce the noise generated by this subset. A source of noise comes from moving elements. Accordingly, it is advantageous, from a sound point of view, to improve the positioning of the movable elements relative to each other and more particularly, the parts of the first floor, since they turn the fastest.

Le brevet EP-A-0 863 331 illustre une conception où l'arbre moteur est guidé par un coussinet inséré au centre d'un carter. L'extrémité de l'arbre moteur est reliée au solaire du premier étage de réduction par un accouplement. D'autre part, le carter comporte un alésage permettant de centrer le barillet. Par ailleurs, le solaire est centré par un téton, prolongeant le solaire, logé dans une pièce rapportée sur le barillet. Pour diminuer le bruit, le jeu d'engrènement doit être réduit, ce qui implique un bon positionnement entre le solaire et les satellites. Or, comme les satellites sont directement positionnés par rapport au barillet, il est important que le solaire soit également bien positionné par rapport au barillet. Dans le cas illustré par ce brevet, le solaire est bien centré à une première extrémité, grâce au téton en bout du pignon. Par contre, le centrage de la seconde extrémité du solaire par rapport au barillet est moins direct. En effet, le solaire est relié à la pièce d'accouplement qui coopère avec l'arbre moteur, celui-ci étant guidé par le coussinet fixé au carter qui, enfin, centre le barillet. Le débattement de la seconde extrémité peut ainsi être suffisamment important pour perturber l'engrènement et générer du bruit.The patent EP-A-0 863 331 illustrates a design where the motor shaft is guided by a pad inserted in the center of a housing. The end of the motor shaft is connected to the solar of the first reduction stage by a coupling. On the other hand, the housing has a bore for centering the barrel. In addition, the solar is centered by a nipple, extending the solar, housed in a patch on the barrel. To reduce the noise, the meshing game must be reduced, which implies a good positioning between the solar and the satellites. Since the satellites are directly positioned with respect to the barrel, it is important that the solar is equally well positioned relative to the barrel. In the case illustrated by this patent, the solar is well centered at a first end, thanks to the pin at the end of the pinion. On the other hand, the centering of the second end of the solar with respect to the barrel is less direct. Indeed, the solar is connected to the coupling part which cooperates with the motor shaft, the latter being guided by the bearing fixed to the housing which, finally, centers the barrel. The travel of the second end can be large enough to disrupt the meshing and generate noise.

Exposé de l'invention : Presentation of the invention

L'invention propose un réducteur pour actionneur électromécanique comprenant un étage de réduction comprenant un solaire engrenant avec au moins un satellite logé dans un barillet. Ce satellite tourne autour d'un arbre solidaire du barillet et engrène avec une couronne fixe pour entraîner en rotation le barillet autour d'un axe de rotation. Le solaire et le barillet sont guidés en rotation, autour de l'axe de rotation, par un même moyen de guidage.The invention proposes a gearbox for an electromechanical actuator comprising a reduction stage comprising a sun meshing with at least one satellite housed in a barrel. This satellite revolves around a shaft integral with the barrel and meshes with a fixed ring gear to rotate the barrel about an axis of rotation. The solar and the barrel are guided in rotation, around the axis of rotation, by the same guide means.

L'utilisation d'un même moyen de guidage permet d'améliorer le positionnement du solaire par rapport au barillet et, en conséquence, celui du solaire par rapport au satellite. L'agencement de ces pièces est régulier ce qui réduit le niveau sonore généré par l'actionneur.The use of the same guidance means makes it possible to improve the positioning of the solar with respect to the cylinder and, consequently, that of the solar with respect to the satellite. The arrangement of these parts is regular which reduces the noise level generated by the actuator.

Le positionnement du solaire par rapport au barillet est direct car le solaire est guidé en rotation par deux moyens de guidage en contact avec le barillet. L'arbre supportant le satellite est fixé sur le barillet à chaque extrémité ce qui assure une position stable de l'arbre dans le barillet. Le jeu d'engrènement est ainsi maîtrisé.The positioning of the solar with respect to the barrel is direct because the solar is guided in rotation by two guide means in contact with the barrel. The shaft supporting the satellite is fixed on the barrel at each end which ensures a stable position of the shaft in the barrel. The game of meshing is thus mastered.

Le moyen de guidage peut être solidaire du barillet. Il est alors en contact avec le solaire mais est également logé, en partie, dans un emplacement d'un carter fixe. Dans ce cas, le solaire est mobile par rapport au moyen de guidage et le sous-ensemble formé du barillet et du moyen de guidage est mobile par rapport au carter fixe. Le moyen de guidage assure ainsi la fonction de guidage en rotation du solaire et du barillet autour de leur axe de révolution.The guide means may be integral with the barrel. It is then in contact with the sun but is also housed, in part, in a location of a fixed housing. In this case, the solar is movable relative to the guide means and the subassembly formed of the barrel and the guide means is movable relative to the fixed casing. The guiding means thus ensures the rotational guiding function of the solar and the barrel around their axis of revolution.

Alternativement, le moyen de guidage peut être solidaire d'un carter fixe. Il est alors en contact avec le solaire et le barillet afin de guider les pièces en rotation. Dans ce cas, le solaire et le barillet sont mobiles par rapport au moyen de guidage.Alternatively, the guide means may be integral with a fixed housing. It is then in contact with the solar and the barrel to guide the rotating parts. In this case, the solar and the barrel are movable relative to the guiding means.

Ces deux modes de réalisations permettent de créer un sous-ensemble compact facilitant l'assemblage du réducteur. Ce sous-ensemble peut comprendre le barillet équipé de ses satellites, le solaire inséré à l'intérieur, le moyen de guidage, une pièce d'accouplement à un arbre moteur et, selon le mode de réalisation, un carter.These two embodiments make it possible to create a compact subassembly facilitating assembly of the reducer. This subset may include the barrel equipped with its satellites, the solar inserted inside, the guide means, a coupling part to a motor shaft and, according to the embodiment, a housing.

Pour diminuer l'encombrement du sous-ensemble, plusieurs aménagements peuvent être envisagés :

  • le premier moyen de guidage comprend un alésage permettant de guider en rotation le solaire et au moins une partie radiale externe permettant de guider en rotation le barillet
  • une partie des moyens de guidage du solaire est disposée à l'intérieur du barillet.
  • le moyen de guidage comprend une partie chevauchant axialement le barillet et une partie débordant axialement du barillet.
  • le diamètre externe maximal du moyen de guidage est inférieur au diamètre externe maximal du barillet
To reduce the size of the subassembly, several arrangements can be envisaged:
  • the first guide means comprises a bore for rotating the solar guide and at least one outer radial portion for rotating the barrel
  • part of the solar guide means is disposed inside the barrel.
  • the guide means comprises a portion axially overlapping the barrel and an axially projecting portion of the barrel.
  • the maximum external diameter of the guiding means is smaller than the maximum external diameter of the barrel

Cette invention est particulièrement adaptée pour un train planétaire simple de type II.This invention is particularly suitable for a simple planetary gear type II.

L'invention concerne également un actionneur tubulaire électrique de manoeuvre d'un écran domotique, cet actionneur intégrant un réducteur tel que mentionné ci-dessus.The invention also relates to an electric tubular actuator for operating a home automation screen, this actuator incorporating a gear as mentioned above.

Description des dessins : Description of the drawings :

L'invention sera mieux comprise à la lecture de la description qui va suivre, donnée uniquement à titre d'exemple et faite en se référant aux dessins annexés sur lesquels :

  • la figure 1 est une illustration schématique de l'architecture d'un actionneur tubulaire ;
  • la figure 2 est une coupe partielle d'un actionneur tubulaire illustrant un étage de réduction selon l'invention, elle correspond à la partie A de la figure 1 ;
  • la figure 3 est une vue, à plus grande échelle, du détail B de la figure 2 ;
  • la figure 4 est une vue en perspective d'un barillet équipé selon l'invention.
The invention will be better understood on reading the description which follows, given solely by way of example and with reference to the appended drawings in which:
  • the figure 1 is a schematic illustration of the architecture of a tubular actuator;
  • the figure 2 is a partial section of a tubular actuator illustrating a reduction stage according to the invention, it corresponds to the part A of the figure 1 ;
  • the figure 3 is a view, on a larger scale, of detail B of the figure 2 ;
  • the figure 4 is a perspective view of a barrel equipped according to the invention.

Description des modes de réalisation : Description of the embodiments :

La figure 1 représente schématiquement un actionneur tubulaire 1 composé d'un tube 2 à l'intérieur duquel est logé un moteur électrique 3. Cet actionneur est destiné à la manoeuvre d'un écran domotique, tel qu'un store (extérieur ou intérieur), un volet roulant, un écran de vidéoprojection ou une grille de fermeture. Le moteur électrique 3 est couplé à un réducteur 4, de manière à ce que l'arbre de sortie 5 du réducteur tourne à une vitesse souhaitée. Le réducteur 4 comprend un train planétaire simple de type II. L'arbre de sortie 5 du réducteur correspond à l'arbre de sortie de l'actionneur. Il entraîne une roue solidaire d'un tube d'enroulement dans lequel est inséré l'actionneur et autour duquel s'enroule l'écran motorisé, ces éléments n'étant pas représentés. Le moteur 3 est par ailleurs alimenté par un câble électrique 6 relié à un module de contrôle 7. Qu'il soit mécanique ou électronique, le module de contrôle 7 permet de couper l'alimentation du moteur lorsque l'écran atteint une position particulière et/ou reçoit un ordre d'un point de commande. Le module de contrôle 7 comprend une interface 71 destiné à permettre la fixation de l'actionneur 1 sur un support fixé sur un bâti. Le module de contrôle est alimenté par un câble secteur 8.The figure 1 schematically represents a tubular actuator 1 composed of a tube 2 inside which is housed an electric motor 3. This actuator is intended for the operation of a home automation screen, such as a blind (outside or inside), a shutter wheel, a video projection screen or a closing grid. The electric motor 3 is coupled to a gearbox 4, so that the output shaft 5 of the gearbox rotates at a desired speed. The gearbox 4 comprises a simple planetary gear type II. The tree output 5 of the gearbox corresponds to the output shaft of the actuator. It drives a wheel integral with a winding tube in which is inserted the actuator and around which winds the motorized screen, these elements not being represented. The motor 3 is also powered by an electric cable 6 connected to a control module 7. Whether mechanical or electronic, the control module 7 can cut off the motor power when the screen reaches a particular position and / or receives an order from a control point. The control module 7 comprises an interface 71 intended to allow the attachment of the actuator 1 on a support fixed on a frame. The control module is powered by a mains cable 8.

Les figures 2 à 4 représentent le premier étage du réducteur 4 de l'actionneur tubulaire 1. Le moteur 3, inséré à l'intérieur du tube 2, comprend un stator bobiné 31 dont le chignon 31 b du bobinage est logé à l'intérieur d'un carter torique 32. Ce carter torique 32 s'insère dans un bol 33 intégrant un coussinet auto-lubrifiant 34 guidant en rotation l'arbre moteur 35. L'arbre moteur 35 est solidaire du rotor du moteur. Il est entraîné en rotation par le stator bobiné 31. Une première pièce interface 36 est fixée à une extrémité de l'arbre moteur 35. Elle coopère avec une deuxième pièce interface 41, fixée sur le solaire 42 du premier étage du réducteur 4. Ces deux pièces d'interface 36 et 41 forment un accouplement entre le moteur 3 et le réducteur 4.The Figures 2 to 4 represent the first stage of the gearbox 4 of the tubular actuator 1. The motor 3, inserted inside the tube 2, comprises a wound stator 31 whose winding bun 31 b is housed inside an O-ring. 32. This O-ring 32 fits into a bowl 33 incorporating a self-lubricating bearing 34 rotating the motor shaft 35. The motor shaft 35 is integral with the motor rotor. It is rotated by the wound stator 31. A first interface piece 36 is fixed to one end of the drive shaft 35. It cooperates with a second interface piece 41, fixed on the solar 42 of the first stage of the gearbox 4. These two interface pieces 36 and 41 form a coupling between the motor 3 and the gearbox 4.

Avantageusement, la deuxième pièce interface 41 est bi-matière. Une première partie 411 est en matière amortissante, par exemple en élastomère. Cette partie coopère avec la première pièce interface et permet de réduire le bruit. La deuxième partie 412 est en matière plus rigide que la première partie, par exemple en métal. Cette partie coopère avec le solaire 42 et permet de transmettre le couple au réducteur.Advantageously, the second interface piece 41 is bi-material. A first part 411 is of damping material, for example elastomer. This part cooperates with the first interface piece and reduces the noise. The second part 412 is made of a more rigid material than the first part, for example of metal. This part cooperates with the solar 42 and makes it possible to transmit the torque to the gearbox.

Le solaire 42 comporte un arbre 421 et un pignon 422 monté serrant sur l'arbre 421. Le pignon 422 comprend deux dentures hélicoïdales 422a, 422b. Le solaire 42 est entraîné en rotation par la deuxième pièce interface 41 monté serrant sur une première extrémité de l'arbre 421. Il est guidé en rotation par deux coussinets auto-lubrifiants 43, 44. Ces coussinets sont montés serrant sur un barillet 45, respectivement dans des alésages 453 et 454 dont on note D453 et D454 les diamètres. Le premier coussinet 43 assure le guidage de l'arbre 421 vis à vis du barillet 45 et est positionné entre la pièce interface 41 et le pignon 422. Le premier coussinet 43 est solidaire du barillet 45. Le deuxième coussinet 44 assure également le guidage de la deuxième extrémité de l'arbre 421 vis à vis du barillet 45.The solar 42 comprises a shaft 421 and a pinion 422 mounted tightly on the shaft 421. The pinion 422 comprises two helical gears 422a, 422b. The solar 42 is rotated by the second interface piece 41 mounted clamping on a first end of the shaft 421. It is guided in rotation by two self-lubricating bearings 43, 44. These pads are mounted clamping on a cylinder 45, respectively in bores 453 and 454 whose diameters are D 453 and D 454 . The first bearing 43 guards the shaft 421 with respect to the barrel 45 and is positioned between the interface piece 41 and the pinion 422. The first bearing 43 is integral with the barrel 45. The second bearing 44 also guides the barrel 45. the second end of the shaft 421 with respect to the barrel 45.

Le premier coussinet 43 comprend une partie radiale interne 431 qui entoure directement l'arbre 421 et qui est située radialement dans le barillet 45 et, le long de l'axe X4, au niveau de ce barillet. L'arbre 421, dont on note D421 le diamètre extérieur, est monté avec possibilité de rotation dans un alésage de la partie 431 du premier coussinet 43, dont on note D431 le diamètre. La partie 431 chevauche axialement le barillet 45. Le coussinet 43 comprend également une partie radiale externe 432 qui déborde axialement du barillet 45, en direction du moteur 3, ce qui lui permet de coopérer avec l'alésage 491.The first pad 43 comprises an inner radial portion 431 which directly surrounds the shaft 421 and which is situated radially in the barrel 45 and, along the axis X 4 , at the level of this barrel. The shaft 421, whose external diameter D 421 is noted, is rotatably mounted in a bore of the portion 431 of the first bearing 43, whose diameter is D 431 . The portion 431 axially overlaps the barrel 45. The bearing 43 also comprises an outer radial portion 432 which protrudes axially from the barrel 45 towards the motor 3, which allows it to cooperate with the bore 491.

Le solaire 42 engrène avec trois satellites 46, 46' et 46". Chaque satellite est disposé à 120° par rapport aux deux autres. Chaque satellite tourne autour d'un arbre 47, 47' et 47" dont les extrémités sont montées sur le barillet 45. Chaque satellite comprend trois dentures 46a, 46b et 46c. Les deux premières dentures 46a et 46b sont hélicoïdales et engrènent avec les dentures hélicoïdales 422a, 422b du solaire. La troisième denture 46c est droite et engrène avec une denture intérieure 48c d'une couronne 48 fixe dans un carter 49. De cette manière, la rotation du solaire 422 entraîne la rotation du barillet 45 autour d'un axe commun X4. Le barillet est guidé en rotation, d'un coté, vis à vis du de la couronne fixe 48, par une collerette 451 logée dans un alésage de la couronne fixe 48 dont on note D48 le diamètre et, de l'autre coté, vis à vis du carter 49, par la partie radiale externe 432 du premier coussinet 43 qui coopère avec un alésage 491 du carter 49. On note D432 le diamètre externe de la partie 432 et D491 le diamètre interne de l'alésage 491 du carter 49, ces diamètres étant sensiblement égaux.Solar 42 meshes with three satellites 46, 46 'and 46 "Each satellite is arranged at 120 ° relative to the other two Each satellite revolves around a shaft 47, 47' and 47" whose ends are mounted on the barrel 45. Each satellite comprises three teeth 46a, 46b and 46c. The first two teeth 46a and 46b are helical and mesh with the helical gears 422a, 422b of the solar. The third toothing 46c is straight and meshes with an internal toothing 48c of a ring 48 fixed in a housing 49. In this way, the rotation of the solar 422 causes the rotation of the barrel 45 about a common axis X 4 . The barrel is guided in rotation, on one side, with respect to the fixed ring gear 48, by a flange 451 housed in a bore of the fixed ring 48 whose diameter is D 48 and, on the other side, against the casing 49, by the outer radial portion 432 of the first bearing 43 which cooperates with a bore 491 of the casing 49. D denotes D 432 the outer diameter of the portion 432 and D 491 the internal diameter of the bore 491 of the casing 49, these diameters being substantially equal.

Le diamètre externe maximal du coussinet 43 est le diamètre D432 de la partie 432. Il est inférieur au diamètre externe maximal D45 du barillet 45.The maximum outside diameter of the bearing 43 is the diameter D 432 of the portion 432. It is smaller than the maximum outside diameter D 45 of the barrel 45.

Le barillet 45 comprend en outre un logement interface 452 destiné à accueillir une forme complémentaire d'une pièce 50 d'un frein, ou du solaire d'un étage de réduction suivant.The barrel 45 further comprises an interface housing 452 intended to accommodate a complementary shape of a part 50 of a brake, or the sun of a subsequent reduction stage.

Ainsi conçu, l'assemblage de l'actionneur peut être simplifié du fait qu'un sous-ensemble compact peut être préparé préalablement. Le sous-ensemble compact comprend le barillet, équipé des satellites et des deux coussinets, le solaire, logé à l'intérieur du barillet et centré par rapport celui-ci grâce aux deux coussinets, et la deuxième pièce interface montée serrant sur l'extrémité du solaire. Ce sous-ensemble compact et solidaire est facile à manipuler.Thus designed, the assembly of the actuator can be simplified because a compact subset can be prepared beforehand. The compact subassembly includes the barrel, equipped with satellites and two pads, the solar, housed inside the barrel and centered relative to it thanks to the two pads, and the second piece mounted interface clamping on the end solar. This compact and solid subassembly is easy to handle.

L'avantage de cette solution est un bon guidage du solaire par rapport au barillet ce qui induit un bon positionnement du solaire par rapport aux satellites. De ce fait, l'engrènement entre les pignons est régulier, le jeu d'engrènement peut être réduit, tout comme le niveau sonore de l'actionneur.The advantage of this solution is a good guidance of the solar compared to the cylinder which induces a good positioning of the solar compared to the satellites. As a result, the meshing between the gears is regular, the meshing clearance can be reduced, as can the sound level of the actuator.

Une solution alternative consiste à rendre solidaire le premier coussinet 43 du carter 49 au lieu qu'il soit solidaire du barillet 45. Dans ce cas, ce coussinet est fixe, contrairement au mode de réalisation précédent où il tourne conjointement avec le barillet. Le guidage en rotation ne se fait plus entre le premier coussinet 43 et le carter 49 mais entre le premier coussinet 43 et le barillet 45, entre la surface externe d'une partie 433 du premier coussinet, dont on note D433 le diamètre, et l'alésage 453 du barillet 45. Avec ce mode de réalisation, le sous-ensemble compact proposé est différent. Il intègre, en plus, le carter 49.An alternative solution is to make integral the first bearing 43 of the housing 49 instead of being integral with the cylinder 45. In this case, this pad is fixed, unlike the previous embodiment where it runs jointly with the barrel. The rotational guidance is no longer between the first bearing 43 and the casing 49 but between the first bearing 43 and the barrel 45, between the outer surface of a portion 433 of the first bearing, whose diameter is denoted by D 433 , and the bore 453 of the barrel 45. With this embodiment, the proposed compact subassembly is different. It integrates, in addition, the housing 49.

Le premier coussinet 43 a une double fonction : Il sert, à la fois, à centrer le solaire 42 dans le barillet 45 et à centrer le barillet 45 dans le carter 49. Il est indépendant du carter 49, ce qui permet de le concevoir avec de petites dimensions et d'envisager ainsi de le fabriquer dans une matière favorisant le guidage en rotation, telle que du bronze auto-lubrifiant.The first pad 43 has a dual function: It serves both to center the sun 42 in the cylinder 45 and to center the cylinder 45 in the housing 49. It is independent of the housing 49, which allows to design it with small dimensions and thus consider making it in a material promoting rotational guidance, such as self-lubricating bronze.

L'invention s'applique également à des barillets constituant d'autres types d'étages de réduction.The invention also applies to barrels constituting other types of reduction stages.

Le barillet n'est pas limité à l'utilisation de trois satellites. Il peut en supporter plus ou moins.The barrel is not limited to the use of three satellites. He can bear more or less.

Claims (10)

  1. A reduction gear (4) of an electric actuator (1) for driving a home screen, the reduction gear comprising a reduction stage having a sun gear (42) meshing with at least one planet gear (46, 46', 46") rotating about a respective shaft (47, 47', 47") and positioned in a drum (45), the planet gear meshing with a stationary ring (48) to drive the drum in rotation about an axis of rotation (X4), characterized in that it further comprises first guide means (43) serving both to guide the sun gear (42) in rotation and to guide the drum (45) in rotation about the axis of rotation (X4).
  2. A reduction gear according to claim 1, characterized in that second guide means (44) serve likewise to guide the sun gear (42) in rotation, the second guide means being received in the drum (45).
  3. A reduction gear according to any one of the preceding claims, characterized in that the first guide means (43) are secured to the drum (45).
  4. A reduction gear according to any one of the preceding claims, characterized in that the first guide means (43) includes
    both a bore (431), serving to guide the sun gear (42) in rotation, and at least a radially-outer portion (432, 433) serving to guide the drum (45) in rotation.
  5. A reduction gear according to any one of the preceding claims, characterized in that a portion of the guide means (43, 44) for the sun gear is located inside the drum.
  6. A reduction gear according to any one of the preceding claims, characterized in that the first guide means (43) includes both a portion (431) axially overlapping the drum (45) and a portion (432) projecting axially from the drum.
  7. A reduction gear according to any one of the preceding claims, characterized in that the maximum outside diameter (D432) of the first guide means (43) is less than the maximum outside diameter (D45) of the drum (45).
  8. A reduction gear according to any one of the preceding claims, characterized in that the first guide means is a bushing (43).
  9. A reduction gear according to any one of the preceding claims, characterized in that the reduction stage (4) is a simple compound planetary gearset (type II).
  10. An electric tubular actuator (3) for driving a home screen, the actuator being characterized in that it incorporates a reduction gear (4) according to any preceding claim.
EP11158393A 2010-03-19 2011-03-16 Reduction gearing and electric actuator with such a reduction gearing Active EP2372187B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1052003A FR2957628B1 (en) 2010-03-19 2010-03-19 REDUCER AND ELECTRIC ACTUATOR COMPRISING SUCH A REDUCER

Publications (2)

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EP2372187A1 EP2372187A1 (en) 2011-10-05
EP2372187B1 true EP2372187B1 (en) 2012-10-03

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US (1) US8597157B2 (en)
EP (1) EP2372187B1 (en)
JP (1) JP5714950B2 (en)
CN (1) CN102195402B (en)
ES (1) ES2393966T3 (en)
FR (1) FR2957628B1 (en)
RU (1) RU2556265C2 (en)

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US9598901B2 (en) 2013-09-18 2017-03-21 Lutron Electronics Co., Inc. Quiet motorized window treatment system
WO2016056471A1 (en) * 2014-10-07 2016-04-14 日本電産サンキョー株式会社 Tubular motor, brushless motor control method, and motor with brake
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CN105489123A (en) * 2016-01-04 2016-04-13 京东方科技集团股份有限公司 Display device
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RU2556265C2 (en) 2015-07-10
US20110230293A1 (en) 2011-09-22
FR2957628B1 (en) 2012-04-20
FR2957628A1 (en) 2011-09-23
CN102195402B (en) 2015-11-18
JP2011196547A (en) 2011-10-06
CN102195402A (en) 2011-09-21
JP5714950B2 (en) 2015-05-07
US8597157B2 (en) 2013-12-03
EP2372187A1 (en) 2011-10-05
ES2393966T3 (en) 2013-01-03
RU2011110393A (en) 2012-09-27

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